Ik this is easy but can someone help me?

A recent gasoline survey said that the national average price of gasoline was $1.298 a gallon. It was felt that gasoline price i

slava [35]

Answer:

alternative hypothesis : H₁ :

Recent Gasoline surveys felt that gasoline price in Texas was significantly lower than the national average

Alternative Hypothesis : H₁: μ < $1.298 a gallon

Step-by-step explanation:

Explanation:-

Given A recent gasoline survey said that the national average price of gasoline was $1.298 a gallon

Population average μ= $1.298 a gallon

sample size 'n' = 37

Sample mean (x⁻) = $1.192 a gallon

Sample standard deviation 'S' = $0.0436

Null hypothesis :H₀ : μ = $1.298 a gallon

Alternative Hypothesis : μ < $1.298 a gallon

Degrees of freedom : ν = n-1= 37-1=36

t₀.₀₂₅ = 1.688

Test statistic

$t = \frac{x^{-}-mean }{\frac{S}{\sqrt{n} } }$

$t = \frac{1.192-1.298 }{\frac{0.0436}{\sqrt{37} } }$

t = -14.8044

|t| = |-14.8044| > 1.688

Null hypothesis is rejected

Alternative hypothesis is accepted

Recent Gasoline surveys felt that gasoline price in Texas was significantly lower than the national average

6 0

3 years ago

30 Points!!!!

irina1246 [14]

Answer:

The answer is four months

Step-by-step explanation:

You have a starting cost of $50 with a $20 fee every month

OR

You have a starting cost of $30 with a $25 fee every month

Start: $50 ($20 per month)

M1 = $70, M2 = $90, M3 = $110, M4 = $130

Start: $30 ($25 per month)

M1 = $55, M2 = $80, M3 = $105, M4 = $130

In conclusion, the prices of the two will match at Month 4

3 0

3 years ago

Who Discovered Mathematics

algol13

Not funny ^ :|... The answer would be the Gupta Empire..

8 0

3 years ago

Simplify the expression: (9 + 6m) + 21

slega [8]

Answer:

6m+30

Step-by-step explanation:

Add 9 and 21

Hope this Helped!

5 0

3 years ago

It is believed that the SAT scores for students entering two state universities may have different standard deviations. Specific

Eva8 [605]

Answer:

The critical value of F is 3.55.

Step-by-step explanation:

The claim to be test is, the SAT scores for students entering two state universities may have different standard deviations. It is believed that the standard deviation at University A is greater than the standard deviation at University B.

The hypothesis for the test can be defined as:

H₀: The standard deviations are same, i.e. σ₁ = σ₂

Hₐ: The standard deviations are different, i.e. σ₁ > σ₂.

A F-test will be used to perform the hypothesis test.

The F-statistic is given by:

$F=\frac{S_{1}^{2}}{S_{2}^{2}}\sim F_{\alpha/2, (n_{1}-1),(n_{2}-1)$

The information provided is:

University A University B

Sample mean 1104 1254

Sample Standard Deviation 134 108

Sample size 14 8

Compute the critical value of F using MS-Excel as follows:

The degrees of freedom are:

df₁ = n₁ - 1 = 14 - 1 = 13

df₂ = n₂ - 1 = 8 - 1 = 7

Step 1:

Open function → F.INV.RT

A dialog box will open.

Step 2:

Enter the details as shown in the image below. Press OK

Thus, the critical value of F is 3.55.

3 0

3 years ago